<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
       </el-breadcrumb>
    <!-- 卡片试图区 -->
        <el-card>
            <el-alert title="添加商品信息" type="info" show-icon> </el-alert>

            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                         <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                         <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                         <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                         <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <!-- v-model取到的值放在那里 prop校验哪个 ：props value 取到的值 label 看到的字 -->
                         <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader v-model="addForm.goods_cat" :options="catelist"
                             :props="cateProps" @change="handleChange">

                            </el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyTableDate" :key="item.attr_id">
                           <!-- 复选框 -->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="ab" v-for="(ab,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableDate" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>  
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload action="https://lianghj.top:8888/api/private/v1/upload" :headers="headerObj"
                        :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :on-success="handleSuccess" >

                            <el-button size="small" type="primary">点击上传</el-button>
                            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器 -->
                        <quill-editor v-model="addForm.goods_introduce">

                        </quill-editor>
                        <el-button type="primary" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        
        <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
            <img :src="preview" >
        </el-dialog>

    </div>
</template>

<script>
import _ from 'lodash';
export default {
    data(){
        return{
            activeIndex:'0',
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:'',
                pics : [],
                goods_introduce:'',
                attrs:[]
                
            },
            addFormRules:{
                goods_name:[
                    { required: true, message: '请输入商品名称', trigger: 'blur' },
                ],
                goods_price:[
                    { required: true, message: '请输入商品价格', trigger: 'blur' },
                ],
                goods_weight:[
                    { required: true, message: '请输入商品重量', trigger: 'blur' },
                ],
                goods_number:[
                    { required: true, message: '请输入商品数量', trigger: 'blur' },
                ],
                goods_cat:[
                    { required: true, message: '请选择商品分类', trigger: 'blur' },
                ],

            },
            catelist:[],
            cateProps:{
                expandTrigger: 'hover',
                value: 'cat_id',
                label: 'cat_name',
                children:'children'
            },
            // 动态参数列表数据
            manyTableDate:[],
            onlyTableDate:[],
            // 图片上传页面调用接口加入axios请求头
            headerObj:{
                Authorization : window.sessionStorage.getItem('token')
            },
            preview: '',
            previewVisible: false ,

      }

    },
    
    created(){
        this.getCateList()
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        },
    },
    methods:{
       async getCateList(){
        const {data:res} = await this.$http.get('categories')
        if(res.meta.status!==200) return this.$message.error('获取参数失败')
        this.catelist = res.data
        console.log(this.catelist)
        },
    handleChange(){
        // 让选择器无法选中2级  判断他的长度就行
        if(this.addForm.goods_cat.length!==3){
            this.addForm.goods_cat = []
        }
    },
    // 进入第二个页面的条件
    beforeTabLeave(activeName,oldActiveName){
        if(oldActiveName === '0' && this.addForm.goods_cat.length!==3){
            return false
        }
    },
    async tabClicked(){
        // 动态参数列表 先看现在是在哪个tag中
        if(this.activeIndex === '1'){
            const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{ sel : 'many'}
            })
        if(res.meta.status!==200) return this.$message.error('错误')
        res.data.forEach(item =>{
            item.attr_vals =  item.attr_vals.length===0? [] : item.attr_vals.split(' ')
        })
        this.manyTableDate = res.data
       console.log(res.data)
       }else if(this.activeIndex === '2'){
           const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{ sel : 'only'}
            })
        if(res.meta.status!==200) return this.$message.error('错误')
        this.onlyTableDate = res.data
       console.log(res.data)
       }
    },
        handlePreview(file){
            const preview = file.response.data.url
            console.log(file)
            this.previewVisible = true
            
        },
        handleRemove(file){
            const filepath = file.response.data.tmp_path
            const i =this.addForm.pics.findIndex(x=>x.pic ===filepath)
            this.addForm.pics.splice(i,1)
            console.log(this.addForm.pics)
        },
        handleSuccess(response, file, fileList){
           
           const pic = {"pic": response.data.tmp_path}
           this.addForm.pics.push(pic)
           console.log(this.addForm.pics)
        },
        add(){
            this.$refs.addFormRef.validate(async valid =>{
                if(!valid) return this.$message.error('请添加表单项')
                // 发起请求
            const form = _.cloneDeep(this.addForm)    
            form.goods_cat = form.goods_cat.join(',')
            console.log(this.manyTableDate)
            this.manyTableDate.forEach(item => {
                const attr = {"attr_id":item.attr_id , "attr_value":item.attr_vals.join(' ')}
                this.addForm.attrs.push(attr)
            })
            this.onlyTableDate.forEach(item => {
                const attr = {"attr_id":item.attr_id , "attr_value":item.attr_vals}
                this.addForm.attrs.push(attr)
            })
            form.attrs = this.addForm.attrs
            // console.log(form)
            const {data:res} = await this.$http.post('goods',form)
            if(res.meta.status!==201) return this.$message.error('添加失败')
            this.$message.success('添加成功')
            this.$router.push('/goods')
           })
        },
    
    
    },
}
</script>

<style scoped>
.el-checkbox{
    margin: 0 10px 0 0;
}
</style>